Started building BINLens

Initial Modules

Added headers and implementation files for the planned architecture:

cli
diagnostic
firmware_image
hex_parser
bin_loader
memmap
entropy
vector_table
format
main

Most analysis modules are still scaffolded. The implemented path at this point is Intel HEX parsing and basic CLI summary output.

Firmware Image Model

Implemented an owned source-chunk model:

BlFirmwareImage now owns parsed chunks.
BlSourceChunk stores:
- start address,
- end address,
- byte length,
- copied byte buffer,
- origin path,
- origin line.
The firmware image tracks:
- chunk count,
- total loaded bytes,
- lowest loaded address,
- highest loaded address.

This gives later work enough structure for memory reconstruction, overlap detection, entropy analysis, and vector table detection.

Intel HEX Parser

Implemented parsing for the Week 1 record scope:

00 data record.
01 end-of-file record.
02 extended segment address.
04 extended linear address.
05 start linear address.

Parser behavior now includes:

required leading colon validation,
header and data hex validation,
record length validation,
checksum validation,
EOF validation,
data-after-EOF rejection,
unsupported record type diagnostics,
line-numbered error messages,
start linear address metadata capture.

Checksum failures now report both the record checksum and computed checksum.

CLI Progress

The CLI now:

parses --help,
parses --version,
accepts --format, --base, --entropy-chunk, --heatmap, --no-color, and --verbose,
infers .hex and .ihex as Intel HEX,
runs the Intel HEX parser,
prints a basic input summary.

Example successful output from a real STM32 demo HEX file:

BINLens 0.1.0-dev

Input
  File:          ..\testfiles\STM32-DEMO.hex
  Format:        Intel HEX
  Records:       486
  Data records:  483
  Bytes loaded:  7728
  Chunks:        483
  Address span:  0x08000000 - 0x08001E2F
  Start linear:  0x08000131

--heatmap is currently accepted but does not produce heatmap output yet.