Standardised item details docs a little

Sort of closes #2125. I've really struggled to find a way to make it
clear that the information returned here is a snapshot of the current
item, and not a live view and/or proxy. Most wordings I've tried end up
feeling really clunky — given that this is a relatively rare
misunderstanding, let's not stress about this too much.

CONTRIBUTING.md

@@ -88,8 +88,8 @@ You'll first need to [set up a development environment as above](#setting-up-a-d
 
 Once this is set up, you can now run `./gradlew docWebsite`. This generates documentation from our Lua and Java code,
 writing the resulting HTML into `./projects/web/build/site`, which can then be opened in a browser. When iterating on
-documentation, you can instead run `./gradlew docWebsite -t`, which will rebuild documentation every time you change a
-file.
+documentation, you can instead run `./gradlew :web:assemble -x :web:compileTeaVM -t`, which will rebuild documentation
+every time you change a file.
 
 Documentation is built using [illuaminate] which, while not currently documented (somewhat ironic), is largely the same
 as [ldoc][ldoc]. Documentation comments are written in Markdown, though note that we do not support many GitHub-specific

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/methods/AbstractFluidMethods.java

@@ -41,9 +41,9 @@ public abstract class AbstractFluidMethods<T> implements GenericPeripheral {
      * The returned table is sparse, and so empty tanks will be `nil` - it is recommended to loop over using [`pairs`]
      * rather than [`ipairs`].
      *
-     * @param fluids The current fluid handler.
+     * @param fluids The current fluid storage.
      * @return All tanks.
-     * @cc.treturn { (table|nil)... } All tanks in this fluid storage.
+     * @cc.treturn { (table|nil)... } Basic information about all fluids in this fluid storage.
      */
     @LuaFunction(mainThread = true)
     public abstract Map<Integer, Map<String, ?>> tanks(T fluids);

projects/common/src/main/java/dan200/computercraft/shared/peripheral/generic/methods/AbstractInventoryMethods.java

@@ -56,8 +56,8 @@ public abstract class AbstractInventoryMethods<T> implements GenericPeripheral {
      * rather than [`ipairs`].
      *
      * @param inventory The current inventory.
-     * @return All items in this inventory.
-     * @cc.treturn { (table|nil)... } All items in this inventory.
+     * @return Basic information about all items in this inventory.
+     * @cc.treturn { (table|nil)... } Basic information about all items in this inventory.
      * @cc.usage Find an adjacent chest and print all items in it.
      *
      * <pre>{@code
@@ -89,9 +89,8 @@ public abstract class AbstractInventoryMethods<T> implements GenericPeripheral {
      *
      * @param inventory The current inventory.
      * @param slot      The slot to get information about.
-     * @return Information about the item in this slot, or {@code nil} if not present.
+     * @return Information about the item in this slot, or {@code nil} if it is empty.
      * @throws LuaException If the slot is out of range.
-     * @cc.treturn table Information about the item in this slot, or {@code nil} if not present.
      * @cc.usage Print some information about the first in a chest.
      *
      * <pre>{@code
@@ -109,7 +108,7 @@ public abstract class AbstractInventoryMethods<T> implements GenericPeripheral {
      */
     @Nullable
     @LuaFunction(mainThread = true)
-    public abstract Map<String, ?> getItemDetail(T inventory, int slot) throws LuaException;
+    public abstract Map<?, ?> getItemDetail(T inventory, int slot) throws LuaException;
 
     /**
      * Get the maximum number of items which can be stored in this slot.

projects/common/src/main/java/dan200/computercraft/shared/turtle/apis/TurtleAPI.java

@@ -694,7 +694,7 @@ public class TurtleAPI implements ILuaAPI {
      * This returns information about the currently equipped item, in the same form as
      * {@link #getItemDetail(ILuaContext, Optional, Optional)}.
      *
-     * @return Details about the currently equipped item, or {@code nil} if no upgrade is equipped.
+     * @return Information about the currently equipped item, or {@code nil} if no upgrade is equipped.
      * @see #equipLeft()
      * @cc.since 1.116.0
      */
@@ -710,7 +710,7 @@ public class TurtleAPI implements ILuaAPI {
      * This returns information about the currently equipped item, in the same form as
      * {@link #getItemDetail(ILuaContext, Optional, Optional)}.
      *
-     * @return Details about the currently equipped item, or {@code nil} if no upgrade is equipped.
+     * @return Information about the currently equipped item, or {@code nil} if no upgrade is equipped.
      * @see #equipRight()
      * @cc.since 1.116.0
      */
@@ -781,7 +781,7 @@ public class TurtleAPI implements ILuaAPI {
      *                 more information about the item at the cost of taking longer to run.
      * @return The command result.
      * @throws LuaException If the slot is out of range.
-     * @cc.treturn nil|table Information about the given slot, or {@code nil} if it is empty.
+     * @cc.treturn nil|table Information about the item in this slot, or {@code nil} if it is empty.
      * @cc.since 1.64
      * @cc.changed 1.90.0 Added detailed parameter.
      * @cc.usage Print the current slot, assuming it contains 13 dirt.