DOC-1054: Update NASA credentials to medium tier template

[freakwriter]

Switched to numbered list for readability.

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Overall readability score: 43.02 (🟢 +0.01)

File	Readability
nasa.md	64.58 (🟢 +9.43)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [nasa.md](https://github.com/n8n-io/n8n-docs/blob/a61f98eb7e8218ad95daae26bbf30ce83289d91c/docs/integrations/builtin/credentials/nasa.md "docs/integrations/builtin/credentials/nasa.md") | 64.58 | 44.81 | 8.62 | 9.4 | 11.17 | 7.88   | 🟢 +9.43 | 🟢 +2.03 | 🟢 +1.54 | 🟢 +1.9 | 🟢 +1.05 | 🟢 +0.69 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 43.02 | 34.75 | 11.68 | 14.89 | 14.37 | 8.55   | 🟢 +0.01 | 🟢 +0 | 🟢 +0 | 🟢 +0 | 🟢 +0 | 🟢 +0

View metric targets

Metric | Range | Ideal score --- | --- | --- Flesch Reading Ease | 100 (very easy read) to 0 (extremely difficult read) | 60 Gunning Fog | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Auto. Read. Index | 6 (very easy read) to 14 (extremely difficult read) | 8 or less Coleman Liau Index | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Dale-Chall Readability | 4.9 (very easy read) to 9.9 (extremely difficult read) | 6.9 or less