move chunk.ts file to core/tree

[daesunp]

Description

Moves the chunk.ts to core/tree to separate some chunk interfaces and types from the ChunkedForest.

[CraigMacomber]

A file should never import a file that exports things from itself. You will need to split this up into more specific imports of other files in core

[daesunp]

Updated imports, which fixed the depcruise error

[msfluid-bot]

Code Coverage Summary

↓ packages.dds.tree.src.feature-libraries.chunked-forest:
Line Coverage Change: -0.19%    Branch Coverage Change: -0.03%

Metric Name	Baseline coverage	PR coverage	Coverage Diff
Branch Coverage	87.40%	87.37%	↓ -0.03%
Line Coverage	95.65%	95.46%	↓ -0.19%

↑ packages.dds.tree.src.core.tree:
Line Coverage Change: 0.30%    Branch Coverage Change: 0.03%

Metric Name	Baseline coverage	PR coverage	Coverage Diff
Branch Coverage	96.56%	96.59%	↑ 0.03%
Line Coverage	88.09%	88.39%	↑ 0.30%

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Baseline commit: 645a1a0
Baseline build: 309185
Happy Coding!!

Code coverage comparison check passed!!

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +245 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	467.24 KB	467.27 KB	⯅ +35 Bytes
azureClient.js	564.01 KB	564.06 KB	⯅ +49 Bytes
connectionState.js	724 Bytes	724 Bytes	■ No change
containerRuntime.js	263.43 KB	263.45 KB	⯅ +14 Bytes
fluidFramework.js	428.84 KB	428.85 KB	⯅ +14 Bytes
loader.js	134.18 KB	134.19 KB	⯅ +14 Bytes
map.js	42.71 KB	42.71 KB	⯅ +7 Bytes
matrix.js	150.15 KB	150.16 KB	⯅ +7 Bytes
odspClient.js	529.85 KB	529.89 KB	⯅ +49 Bytes
odspDriver.js	97.88 KB	97.9 KB	⯅ +21 Bytes
odspPrefetchSnapshot.js	42.81 KB	42.83 KB	⯅ +14 Bytes
sharedString.js	166.23 KB	166.24 KB	⯅ +7 Bytes
sharedTree.js	419.3 KB	419.3 KB	⯅ +7 Bytes
Total Size	3.38 MB	3.38 MB	⯅ +245 Bytes

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Baseline commit: 6e79694

Generated by 🚫 dangerJS against 722f0e8