Add direct tree rendering and autocomplete

[timkpaine]

Renders gallery tree repeaters as direct light-DOM children and documents when direct mode is required. Adds a Web Awesome input whose hint is populated by a Python endpoint in both server and Pyodide examples.

Adopts structured theme token metadata, requires Spaday 0.11.3, and prepares the 0.6.0 minor release.

[github-actions]

Test Results

50 tests  +2   50 ✅ +2   14s ⏱️ -4s
 2 suites ±0    0 💤 ±0 
 2 files   ±0    0 ❌ ±0 

Results for commit 97551fb. ± Comparison against base commit 2c986cd.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2c986cd) to head (97551fb).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #33   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          224       224           
  Branches        49        49           
=========================================
  Hits           224       224           

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