chore: update the roadmap

[archerny]

Which issue does this PR close?

None.

Rationale for this change

The roadmap is too old. Update our recent work about CeresDB 1.0 and subsequent working schedule.

What changes are included in this PR?

The doc about roadmap.

Are there any user-facing changes?

No.

How does this change test

No need.

[codecov-commenter]

Codecov Report

Merging #584 (149c009) into main (0163f60) will decrease coverage by 0.15%.
The diff coverage is 64.85%.

❗ Current head 149c009 differs from pull request most recent head 4c6a9bc. Consider uploading reports for the commit 4c6a9bc to get more accurate results

@@            Coverage Diff             @@
##             main     #584      +/-   ##
==========================================
- Coverage   62.75%   62.60%   -0.15%     
==========================================
  Files         322      326       +4     
  Lines       49929    50232     +303     
==========================================
+ Hits        31332    31449     +117     
- Misses      18597    18783     +186     

Impacted Files	Coverage Δ
analytic_engine/src/context.rs	0.00% <ø> (ø)
analytic_engine/src/row_iter/chain.rs	52.73% <0.00%> (ø)
analytic_engine/src/row_iter/mod.rs	30.30% <ø> (ø)
analytic_engine/src/setup.rs	54.54% <ø> (ø)
analytic_engine/src/sst/header.rs	0.00% <0.00%> (ø)
analytic_engine/src/sst/parquet/hybrid.rs	96.62% <ø> (ø)
analytic_engine/src/sst/reader.rs	92.30% <ø> (ø)
benchmarks/src/merge_memtable_bench.rs	0.00% <0.00%> (ø)
benchmarks/src/merge_sst_bench.rs	0.00% <0.00%> (ø)
benchmarks/src/parquet_bench.rs	0.00% <ø> (ø)
... and 63 more

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[ShiKaiWi]

LGTM 👍