Docs: Enhance maintenance documentation with new actions

[talatuyarer]

Adds documentation for six table actions that were missing from maintenance.md

[uros-b]

Every documented action, method signature, default value, option, procedure link, and spec anchor has been traced to upstream/main and verified accurate. Several passages are verbatim the source Javadocs, formatting is clean, and build-docs is green on ubuntu and macOS.

One gap that's maybe worth a follow-up is a single sentence on removeDanglingDeleteFiles's no-op behavior for unpartitioned tables.

• docs/docs/maintenance.md (removeDanglingDeleteFiles section): RemoveDanglingDeletesSparkAction.execute() short-circuits to an empty result for unpartitioned tables because ManifestFilterManager already cleans dangling deletes on every commit for those tables. Users who call this on an unpartitioned table will see zero files removed and may be confused; one sentence noting the no-op behavior would prevent a common support question.

But overall this is a nice change - thank you @talatuyarer! and please ping relevant committers to take this further, e.g. @aokolnychyi who owns Spark rewrite and compute-stats actions.

[kevinjqliu]

Thanks for adding more docs!

I have a few minor comments for clarity and readability.

Please take a look: kevinjqliu@90d16ac