fix(gen): separate int53 and int64 encoding

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #605 (4b7d600) into main (cfbba9a) will decrease coverage by 0.47%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main     #605      +/-   ##
==========================================
- Coverage   68.92%   68.45%   -0.48%     
==========================================
  Files         394      395       +1     
  Lines       18487    18555      +68     
==========================================
- Hits        12742    12701      -41     
- Misses       4911     5018     +107     
- Partials      834      836       +2     

Impacted Files	Coverage Δ
bin/decode.go	98.55% <0.00%> (-1.45%)	⬇️
bin/encode.go	95.55% <0.00%> (-4.45%)	⬇️
internal/gen/make_field.go	78.10% <25.00%> (-1.75%)	⬇️
tdjson/decoder.go	21.73% <42.85%> (+9.81%)	⬆️
tdjson/encoder.go	47.61% <60.00%> (+21.14%)	⬆️
telegram/updates/update.go	9.52% <0.00%> (-90.48%)	⬇️
telegram/message/typing.go	68.00% <0.00%> (-20.68%)	⬇️
telegram/updates/gap_buffer.go	71.42% <0.00%> (-10.72%)	⬇️
telegram/updates/state_channel.go	45.75% <0.00%> (-7.08%)	⬇️
telegram/updates/sequence_box.go	80.53% <0.00%> (-0.89%)	⬇️
... and 5 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cfbba9a...4b7d600. Read the comment docs.