feat(tree): Implement TreeView v2 API

[Abe27342]

Description

Implements portions of the v2 schema evolution API which have general agreement. See #20450 for original proposal (which also has some APIs that aren't yet implemented).

See the changeset associated with this PR or adjustments to SharedTree documentation for details.

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +1.84 KB

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	457.66 KB	457.66 KB	■ No change
azureClient.js	558.34 KB	558.34 KB	■ No change
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	260.13 KB	260.13 KB	■ No change
fluidFramework.js	368.07 KB	369 KB	⯅ +943 Bytes
loader.js	135.2 KB	135.2 KB	■ No change
map.js	39.83 KB	39.83 KB	■ No change
matrix.js	142.48 KB	142.48 KB	■ No change
odspClient.js	526.41 KB	526.41 KB	■ No change
odspDriver.js	98.29 KB	98.29 KB	■ No change
odspPrefetchSnapshot.js	42.11 KB	42.11 KB	■ No change
sharedString.js	159.28 KB	159.28 KB	■ No change
sharedTree.js	368.06 KB	368.98 KB	⯅ +943 Bytes
Total Size	3.23 MB	3.23 MB	⯅ +1.84 KB

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Baseline commit: 864bff601000fc8c2d5c5ee7ef2b1cae4864af2f

Generated by :no_entry_sign: dangerJS against a30678e55bf3f019ea9893a9720c9b1ba8ea3cfb

[Abe27342]

putting this in draft while I do actions outlined here.