Add theme generation commands for blocks, sections, and templates #17501

Job	Run time
[Main] Node ${{ matrix.node }} in ${{ matrix.os }}	0s
[PR] Run build with Node 18.20.3 in ubuntu-latest	51s
[PR] Run type-check with Node 18.20.3 in ubuntu-latest	1m 19s
[PR] Run bundle with Node 18.20.3 in ubuntu-latest	1m 10s
[PR] Run lint with Node 18.20.3 in ubuntu-latest	1m 47s
[Manual] Test with Node ${{ inputs.node-version }} in ${{ inputs.os }}	0s
[PR] Check OCLIF manifests & readme & docs	2m 25s
[PR] Accept. Test with Node 18.20.3 in ubuntu-latest	4m 17s
[PR] Accept. Test with Node 18.20.3 in macos-latest	3m 32s
[PR] Check graphql-codegen has been run (macos-latest, 18.20.3)	1m 15s
[PR] Accept. Test with Node 18.20.3 in windows-latest	2m 5s
[PR] Run knip with Node 18.20.3 in ubuntu-latest	33s
[PR] Run Test Coverage with Node 18.20.3 in ubuntu-latest	4m 11s
[PR] Test with Node 18.20.3 in ubuntu-latest	3m 33s
[PR] Test with Node 20.14.0 in ubuntu-latest	3m 16s
[PR] Test with Node 22.2.0 in ubuntu-latest	2m 57s
[PR] Test with Node 18.20.3 in windows-latest	5m 47s
[PR] Test with Node 20.14.0 in windows-latest	5m 34s
[PR] Test with Node 22.2.0 in windows-latest	5m 34s
[PR] Test with Node 18.20.3 in macos-latest	2m 56s
[PR] Test with Node 20.14.0 in macos-latest	2m 47s
[PR] Test with Node 22.2.0 in macos-latest	2m 19s
	58m 8s

Provide feedback