Add minimal CUC quick-start snippet with encode/decode flow

[Copilot]

Quick Start only pointed to examples and did not show a minimal CUC setup inline. This updates README with a compact, copy-ready snippet that shows both encode and mirrored decode paths.

• Quick Start content update

  • Replaced the placeholder “See the examples.” text with an embedded CUC setup snapshot.
  • Kept the snippet minimal: format setup, time creation, buffer allocation, and checked API calls.

• Encode/decode symmetry

  • Added the decode path immediately after encode to mirror real usage and complete the minimum round-trip flow.
  • Preserved concise error-handling placeholders to keep focus on API shape.

• Reference to full example

  • Kept a direct pointer to examples/cuc_example.c for full output/printing flow.

cuc_format_t fmt = {CUC_EPOCH_CCSDS, 4, 2};
cuc_time_t time = cuc_time_from_seconds(1234567.25);

uint8_t buf[CUC_OCTETS_MAX];
size_t written = 0;
if (cuc_encode(&time, &fmt, buf, sizeof(buf), &written) != CUC_OK)
{
    /* handle error */
}

cuc_format_t decoded_fmt;
cuc_time_t decoded;
size_t consumed = 0;
if (cuc_decode(buf, written, &decoded_fmt, &decoded, &consumed) != CUC_OK)
{
    /* handle error */
}

[Copilot]

Copilot review overview

🟡 Changes recommended

The snippet is not compilable under the supported -DCUC_NO_FLOAT configuration.

Review effort: Lite
Findings: 1

Open (1)

• Quick-start snippet breaks with CUC_NO_FLOAT enabled · New

What changed in this PR

Adds a compact CUC encode/decode quick-start snippet to the README.

Changes:

• Adds format, time, buffer, encode, and decode setup.
• Includes checked API calls and a full-example reference.

File	Description
README.md	Adds the minimal CUC quick-start encode/decode flow.

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[Copilot]

Copilot review overview

🟢 Approval recommended

No unresolved review comments remain.

Review effort: Lite
Findings: None

Resolved since last review (1)

• Quick-start snippet breaks with CUC_NO_FLOAT enabled