Bidirectional text improvements (#4541)

* Add support for \dir pragma

* Add "dir" attribute to reveal, edit, edit-text and edit-codemirror widgets

* Add  $:/config/DefaultTextDirection hidden setting

* Revert accidentally commited test data

This reverts some of commit b83c1d160f.

* Remove Codemirror plugin from Prerelease

Makes it easier to test things

* Fix framed text editor directionality in Firefox

* Add direction attribute for edit body template

* Missed closing brace

* Add docs for \dir pragma

* Templates should set text direction from a variable, not a transclusion

* Updates to framed.js in the light of PRs that have been merged since this

* Restore whitespace trim

* Docs dates

* Fix typo

* Clarify docs

editions/tw5.com/tiddlers/Right-To-Left Languages.tid

@@ -0,0 +1,11 @@
+created: 20230613162508509
+modified: 20230613162508509
+title: Right-To-Left Languages
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.3.0">> The [[language plugins|Languages]] in TiddlyWiki's plugin library apply the appropriate [["right-to-left" setting|https://www.w3.org/International/questions/qa-html-dir]] to the entire document. To set the right to left setting independently for an individual tiddler, use the `\dir` [[pragma|Pragma]] at the top of the tiddler:
+
+```
+\dir rtl
+This text will be displayed with right-to-left formatting
+```

editions/tw5.com/tiddlers/pragmas/Pragma_ _dir.tid

@@ -0,0 +1,13 @@
+created: 20230613162508509
+modified: 20230613162508509
+tags: Pragmas
+title: Pragma: \dir
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.3.0">> The ''\dir'' [[pragma|Pragmas]] is used to set the text direction of text within a tiddler -- see [[Right-To-Left Languages]].
+
+The ''\dir'' pragma should be used after any procedure, function, widget or macro definitions.
+
+* `\dir ltr` – sets text direction to left-to-right
+* `\dir rtl` – sets text direction to right-to-left
+* `\dir auto` – causes the browser to attempt to automatically deduce the text direction